Qhov kev siv vuam ntau dhau ntawm cov ntiv taw weld yog qhov ua rau muaj kev ntxhov siab corrosion tawg. Qhov kev ntxhov siab nyob rau hauv pob qij txha yog feem ntau yog vim li cas los ntawm kev sib koom ua ke. Tshwj xeeb, qhov kev ntxhov siab ntawm cov ntiv taw weld, qhov twg cov weld ntsib lub hauv paus hlau, yog qhov siab tshaj plaws.
Qhov loj ntawm qhov kev ntxhov siab concentration yog nyob ntawm qhov siab qhov siab (h), lub kaum sab xis (θ) ntawm cov ntiv taw vuam, thiab lub kaum sab xis (r). Raws li lub vuam qhov siab (h) nce, lub kaum sab xis (θ) loj, thiab lub vojvoog (r) txo qis, ua rau muaj kev ntxhov siab ntau ntxiv.
Qhov loj weld reinforcement qhov siab intensifies qhov kev nyuaj siab concentration, uas paradoxically txo lub zog ntawm lub welded ob leeg. Los ntawm kev tshem tawm cov khoom siv vuam ntau dhau tom qab vuam, tsuav nws tsis poob qis dua qib ntawm cov khoom siv niam txiv, kev ntxhov siab tuaj yeem txo qis, thiab qee zaum, lub zog ntawm cov welded sib koom ua ke tuaj yeem txhim kho.
High sab nraud weld reinforcement yog detrimental rau corrosion tiv thaiv. Thaum epoxy resin-impregnated iav ntaub siv rau kev tiv thaiv corrosion, lub siab sab nraud weld reinforcement tuaj yeem ua rau nws nyuaj rau kev ruaj ntseg ntawm cov ntiv taw weld. Tsis tas li ntawd, qhov siab dua weld yuav tsum muaj txheej txheej tiv thaiv corrosion ntau dua, vim tias lub thickness ntawm cov txheej tiv thaiv yog ntsuas los ntawm qhov siab tshaj ntawm sab nraud weld, yog li ua rau tus nqi ntawm kev tiv thaiv corrosion.
Thaum lub sij hawm muab kauv submerged arc vuam, ib qho kev sib txuas sab nraud nrog "humpback" zoo li feem ntau tshwm sim, ntxiv kev cuam tshuam rau qhov zoo ntawm kev tiv thaiv corrosion. Yog li ntawd, nws yog ib qho tseem ceeb los kho qhov chaw ntawm qhov chaw ntawm lub vuam taub hau thiab vuam txwv kom txo los yog tshem tawm cov "humpback" cov duab ntawm sab nraud weld.
High sab nraud weld reinforcement cuam tshuam cov yeeb nkab zoo tom qab hydrotesting thiab expanding. Nyob rau hauv cov ntaub ntawv ntawm ncaj seam submerged arc welded kav, thaum lub sij hawm hydrotesting thiab expanding, cov yeeb nkab yog kaw los ntawm ob sab nraud pwm, ib tug nyob rau hauv txhua sab, uas nws qhov ntev phim lub expanding loj ntawm cov yeeb nkab steel sab hauv kab noj hniav. Yog li ntawd, kev siv vuam ntau dhau ua rau muaj kev ntxhov siab ntau dua ntawm cov weld thaum lub sij hawm nthuav dav, ua rau muaj qhov tshwm sim ntawm "cov npoo me me" ntawm ob sab ntawm cov weld.
Txawm li cas los xij, kev paub dhau los tau pom tias thaum qhov kev sib txuas sab nraud yog tswj tau ntawm kwv yees li 2 hli, qhov "me me ncaj npoo" tshwm sim tsis tshwm sim thaum lub sij hawm hydrotesting thiab nthuav, khaws cia cov yeeb nkab zoo li qub. Qhov no yog vim hais tias nrog ib tug me me weld reinforcement qhov siab, welded sib koom ua ke muaj kev nyuaj siab shear tsawg. Tsuav qhov kev ntxhov siab no tseem nyob hauv qhov elastic deformation ntau yam, cov yeeb nkab yuav rov qab mus rau nws cov duab qub thaum unloading vim elastic rebound.
High internal weld reinforcement tsub kom lub zog poob hauv qhov nruab nrab kis tau tus mob. Thaum lub puab nto ntawm lub submerged arc welded yeeb nkab siv rau kev sib kis yog tsis coated rau kev tiv thaiv corrosion, ntau sab hauv weld reinforcement tsub kom muaj kev sib txhuam tsis kam tiv thaiv cov kis nruab nrab, uas ua rau muaj zog ntau dua nyob rau hauv cov kav xa mus.
